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Note 8 - Concentrations - Customers Representing 5% or More of Total Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major Customers 1 [Member]
Revenue by customer	$ 87,871	$ 102,265
Major Customers 2 [Member]
Revenue by customer	67,416	69,106
Major Customers 3 [Member]
Revenue by customer	47,452	51,683
Major Customers 4 [Member]
Revenue by customer	45,520	51,480
Major Customers 5 [Member]
Revenue by customer	40,289	43,954
Major Customers 6 [Member]
Revenue by customer	$ 38,333

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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